The largest stationary systems are installed on the ground. In the case of photovoltaic farms with an installed capacity of several hundred MW, the area covered by the installation is in the order of several hundred hectares. One of the largest farms in Poland is a photovoltaic installation in Sokołów Małopolski with a capacity of 2 MW, covering an area of 4 hectares (it is shown in Fig. 1 ). The installation was built on a RS-12 steel structure by RECA SOLAR and based on bifacial module technology. The farm consists of 5970 modules. The general contractor of the farm is Great Solar sp. z o.o. Construction of the farm was completed in 2020.

Figure 1: One of the biggest photovoltaic farms in Poland with the capacity of 2 MW, located in Sokołów Małopolski by Great Solar sp. z o.o. Photo used by permission of Great Solar Sp. z o.o..

The largest PV farm in Europe is the 500 MW Núñez de Balboa, which is located in the province of Usagre, in the Extremadura region of Spain. The farm is located over an area of nearly 1 000 hectares and consists of 1.43 million panels and 115 inverters (2020 data) [1].
The second largest PV farm in Europe is the 300 MW Cestas Solar Park in France. The installation covers 250 hectares and consists of about one million panels.This farm is presented in Fig. 2. The video "Construction of PV power plant in Cestas" shows the construction of the Cestas Solar Par farm, while the video "Krinner Solarpark Cestas" presents a view of the completed construction.

SE Solar, Construction of PV power plant in Cestas, France (Photovoltaic farm installation), 04.12.2015 (accessed). Available on YouTube: https://youtu.be/YBJHUN1og9M.

Steffi Englram, Krinner Solarpark Cestas (Photovoltaic farm), 16.06.2015 (accessed). Available on YouTube: https://youtu.be/qw05UuGaPGM.

To find large areas of unused ground in Europe is difficult compared to Asia's desert and foothill areas. One of the largest solar PV farms installed on land in the world is the Tengger Desert Solar Park with a capacity of 1.547 GW (total installed capacity by May 2020 is 1.95 GW [2]). The farm is located in Zhongwei, China and covers the area of 4 300 hectares. Another large photovoltaic farm in the world is the Longyangxia Dam Solar Park in China. It consists of more than 4 million panels and has an installed capacity of 850 MW [3].

In addition to large photovoltaic farms, systems with capacities ranging from a few to several hundred kW are installed. The installation of this type is shown in Fig. 2.

Figure 2: SolTech Service's ground-mounted photovoltaic installation. Photo used by permission of SolTech Service.